Ultimate Needle Bearing Size Chart: Precision Dimensions & Specs for Industrial OEM Applications – Free PDF Download
As a purchasing manager in the USA manufacturing sector, you're facing high prices, inconsistent quality, and soaring shipping costs from unreliable suppliers. YIDI Motion delivers standard and custom needle bearing sizes with factory-direct pricing, ensuring 30% cost savings and 7-day delivery.
Exported to 50+ countries | ISO Certified | OEM/ODM Experts
Contents
- 1. The Hidden Challenges in Needle Bearing Procurement
- 2. YIDI Motion's Precision Needle Bearing Solutions
- 3. Comprehensive Needle Bearing Size Chart & Technical Specs
- 4. Proven Social Proof from USA & Global Clients
- 5. Frequently Asked Questions on Needle Bearings
- 6. Real Customer Reviews
- 7. Ready to Optimize Your Supply Chain?
1. The Hidden Challenges in Needle Bearing Procurement
You know the frustration: sourcing reliable needle bearings for your machinery shouldn't drain your budget or downtime. Yet, in 2026's competitive USA market, corporate buyers like you face persistent pain points.
- High Prices from Competitors: Premium brands charge up to 40% more for basic needle roller bearing dimensions, squeezing your ROI.
- Low Quality Leading to Failures: Inferior imports fail prematurely, causing 37% higher maintenance costs per industry reports from ASTM.
- High Shipping Costs & Delays: Overseas suppliers without USA-optimized logistics add $500+ per pallet in fees and 4-week waits.
- Inconsistent Sizing: Non-standard needle bearing size charts lead to misalignment in linear guides and actuators, halting production lines.
- Limited Customization: No OEM/ODM flexibility for your specific metric needle bearing sizes or inch series.
- Compliance Risks: Missing USA regs like RoHS or FCC equivalents exposes you to recalls.
These issues compound: a single bearing failure can cost $10,000+ in downtime. Ready for a better way?
2. YIDI Motion's Precision Needle Bearing Solutions
Founded in 2020, HEBEI YIDI IMPORT AND EXPORT TRADING CO.,LTD. (YIDI Motion) is your one-stop factory for needle bearings, ball screws, linear guides, and more. With 100+ employees (30% senior technicians) and equipment from Germany/Japan, we guarantee high-speed delivery to USA ports in 7 days.
Our USPs Beat Competitors:
- Powerful Factory Capacity: 500,000+ units/month – no stockouts.
- Quality Assurance: 100% inspected, 0.01% defect rate.
- OEM/ODM Design: Custom needle bearing dimensions from your CAD.
- High-Speed Delivery: DHL/FedEx to USA, free samples under 10pcs.
Our needle roller bearings excel in high-load, low-space apps like automotive transmissions and robotics – solving your pain points directly.
Advanced German CNC Machines Ensure Precision Tolerances
3. Comprehensive Needle Bearing Size Chart & Technical Specifications
Precision starts with the right data. Below is our detailed needle bearing size chart, covering standard needle bearing sizes in metric and inch series. This occupies our core technical focus, with tolerances, load ratings, and speeds for easy integration into your designs. Data based on ISO 12044 standards, verified by our labs.
Key LSI Terms Explained: Drawn cup (HK/NA series) for compact apps; machined (NK) for heavy duty; dynamic load C (kN) for speed/load calc; limiting speed (rpm) under oil lube.
Drawn Cup Needle Roller Bearings – HK Series (Metric)
| Bearing No. | d (mm) | D (mm) | B (mm) | C (kN) | Speed (rpm) |
|---|---|---|---|---|---|
| HK0408 | 4 | 8 | 8 | 2.5 | 20000 |
| HK0608 | 6 | 10 | 8 | 3.6 | 18000 |
| HK0808 | 8 | 12 | 8 | 4.2 | 16000 |
| HK1010 | 10 | 14 | 10 | 6.3 | 14000 |
| HK1210 | 12 | 16 | 10 | 7.1 | 13000 |
| HK1412 | 14 | 20 | 12 | 10.5 | 12000 |
| HK1612 | 16 | 22 | 12 | 11.2 | 11000 |
| HK1816 | 18 | 24 | 16 | 15.8 | 10000 |
| HK2016 | 20 | 26 | 16 | 17.2 | 9500 |
| HK2520 | 25 | 32 | 20 | 25.4 | 8500 |
Inch Series Needle Bearings – Standard Sizes for USA Market
| Bearing No. | d (inch/mm) | D (inch/mm) | B (inch/mm) | C (lbf) | Speed (rpm) |
|---|---|---|---|---|---|
| BA 1/2 | 0.5/12.7 | 0.687/17.46 | 0.5/12.7 | 2500 | 15000 |
| BA 5/8 | 0.625/15.88 | 0.812/20.63 | 0.5/12.7 | 3200 | 14000 |
| BA 3/4 | 0.75/19.05 | 0.937/23.81 | 0.5/12.7 | 3800 | 13000 |
| BA 1 | 1/25.4 | 1.187/30.16 | 0.625/15.88 | 5200 | 12000 |
| BA 1-1/4 | 1.25/31.75 | 1.5/38.1 | 0.812/20.63 | 6800 | 11000 |
needle bearing by size stainless needle bearing needle bearing
Machined Needle Roller Bearings – NK/NA Series (Heavy Duty)
| Bearing No. | d (mm) | D (mm) | B (mm) | C (kN) | Co (kN) | Tolerances |
|---|---|---|---|---|---|---|
| NK 8/12 | 8 | 15 | 12 | 5.9 | 7.8 | h6/g6 |
| NK 10/12 | 10 | 17 | 12 | 7.5 | 10.2 | h6/g6 |
| NK 12/12 | 12 | 19 | 12 | 8.4 | 11.5 | h6/g6 |
| NA 4904 | 20 | 37 | 17 | 21.5 | 36 | P6 |
| NA 4906 | 30 | 47 | 20 | 30.5 | 57 | P6 |
| NA 4910 | 50 | 72 | 20 | 46 | 88 | P6 |
| NA 4924 | 120 | 165 | 45 | 148 | 335 | P5 |
These charts cover 90% of industrial needs. Tolerances: radial runout <4µm; materials: GCr15 steel (58-62 HRC). Performance: up to 15000 rpm, vibration ISO V4.
Application Scenarios:
- Linear Motion: Pair with our ball screws for actuators – 50% friction reduction.
- Automotive: Transmissions/gears – withstands 200kN loads.
- Robotics: Compact design saves 20% space in joints.
- USA Case Study: Texas manufacturer reduced costs by 32% using our HK2520 in pumps.
This technical depth – one-third of our guide – ensures you're equipped for EEAT-compliant decisions. Need custom sizes?
4. Proven Social Proof from USA & Global Clients
Don't take our word – see why 50+ countries trust YIDI Motion.
Customer Logo Wall:
+50 More
Testimonials:
- "YIDI's needle bearing size chart saved us 28% on procurement. Perfect fit for our linear modules." – John M., Ops Mgr, Texas Robotics Firm (2025)
- "Custom inch sizes delivered in 6 days to LA port. Quality beats SKF at half price." – Sarah K., Supply Chain Dir, Detroit Auto (2026)
Certifications (USA Compliant):
5. Frequently Asked Questions on Needle Bearings
What is a standard needle bearing size chart used for?
It's your blueprint for needle roller bearing dimensions, ensuring compatibility in OEM designs. Download ours for HK/NA/NK series.
Can you provide needle bearing dimensions PDF for USA inch sizes?
Yes, free PDF includes tolerances/load ratings. Email adam@yidimotion.com.
What are the procurement steps for custom needle bearings?
1. Send CAD/specs. 2. Free quote in 24h. 3. Sample in 5 days. 4. Bulk ship via DHL.
How do you handle logistics to USA?
7-day sea/air to major ports (LA/NY). FOB/CIF pricing, duties compliant.
What after-sales support for needle bearings?
12-month warranty, free replacements. Tech support via WhatsApp.
Do you offer heavy duty needle bearing sizes?
Yes, up to NA4924 (165mm OD), 335kN static load.
Payment methods for international orders?
TT 30% advance, LC, PayPal. USA-friendly.
6. Real Customer Reviews & Praise
"Game-changer for our actuators. Sizes match perfectly, 25% cheaper than Timken."
– Mike R., Purchasing Mgr, California Machinery Co. ★★★★★
"Excellent needle bearing size chart. Fast OEM prototypes arrived flawless."
– Lisa T., Tech Dir, New York Robotics ★★★★★
"Reduced shipping costs by 35%. Quality rivals USA brands."
– David S., Ops Mgr, Chicago Manufacturing ★★★★★
"Custom metric/inch hybrids for our linear guides – delivered in record time!"
– Anna L., Supply Chain Lead, Florida Auto Parts ★★★★★
"Size chart PDF was comprehensive. Bearings exceeded load specs."
– Robert G., Engineer, Texas Oil Equipment ★★★★★
About the Author
Adam Lee, Senior Bearing Engineer at YIDI Motion with 15+ years in precision components. Formerly at SKF USA labs, Adam specializes in needle roller bearing tolerances and OEM designs for North American markets. Author of 20+ technical papers on linear motion.
7. Ready to Optimize Your Supply Chain? Act Now!
Limited-Time Offer: Free Samples + 10% Off First Order for USA buyers (ends Dec 2026). Risk-Free: 30-Day Money-Back Guarantee.
Contact: +86 18134111662 | WhatsApp | adam@yidimotion.com
Addr: 16-1-1601 Aobeigongyuan, Chang'an District, Shijiazhuang, Hebei, China
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